In serial log is: SeaBIOS (version rel-1.7.3-123-gfeb0284
 
I build coreboot like this:
cd /coreboot/build
rm coreboot.rom
rm -R seabios
git clone https://github.com/KevinOConnor/seabios -b testing
cd seabios
make menuconfig -> coreboot and debug 8
patch -p1 < fdd.p
patch -p1 < config.p
make
cd ../..
make menuconfig and Payload None
make
./build/cbfstool build/coreboot.rom add-payload -f build/seabios/out/bios.bin.elf -n fallback/payload -c lzma
./build/seabios/scripts/encodeint.py floppy0 4
./build/cbfstool build/coreboot.rom add -f floppy0 -n etc/floppy0 -t raw
./build/seabios/scripts/readserial.py /dev/ttyS0 115200